Temperature-controller.



M. SOHULZ.

TEMPERATURE CONTROLLER.

APPLICATION FILED MAY 23, 1912.

Patented Nov. 18, 1913.

y Wm

MAX SCHULZ, OF OLDENBURG, GERMANY.

TEMPERATURE- CON TRGLLER.

Specification of Letters Patent.

Patented Nov. 18, 1913.

Application filed May 23, 1912. Serial No. 699,255.

To all whom it may concern:

Be it known that I, MAX sorrow, of Old enhurg, Germany, a subject of the King of Prussia, and Whose post-oflice address is 7 ()sterstrasse, Oldenburg, Grand Duchy of ()ldenburg, German Empire, have invented new and useful Improvements in or Relating to TemperatureControllers, of which the following is a specification.

Valves for controlling the flow of steam' to heating apparatus by thermostatic action are in common use, but, where both exhaust and live steam are used conjointly in the same heating apparatus it is desirable to 0perate the valves controlling the .separate sources of supply from one thermostat and to so coordinate the action of the two valves that all initial governing actionshall take effect on the live steam valve, and any reduction of the exhaust steam consumption shall be deferreduntil after the live steam has been entirely shut- 03. Under these conditions the expenditure of live 'steamwill be conserved to the greatest possible extent; and its supply drawn upon onlywhen the demands of,,the apparatus exceed the capacityof the exhaust steam supply. Ihave invented a, simple apparatus for accomplish ing this result.

The .best form of apparatusembodying my invention at present known to me is illustrated in the accompanying sheet of drawings in whichy Figure 1 is a vertical central section of the. valve apparatus, and Fig. 2 is aside elevationof the same showing also certain of the connections therefor. A i v Throughout the drawings like reference characters indicate like parts.

:0 represents awvalve for controlling the exhaust steam supply and b is a similar valve of smaller size for controlling the live steam supply. The supply pipes (not shown) are to be coupled to the upper portions of the valve casings, and the outlet connections m and n are connected together as shown in Fig. 2.

e, the spindle of the exhaust steam .valve is bored out, so that the rod f may extend through it. h, the spindle of the live steam valve 6, is in line with the rod f and spindle 1:, and has a spring-head, ortelescoping section composed of the cylindrical case g containing spiral spring s, and head a of rod f.

This head -0- is retained in cylinder 9 by lugs p--p or equivalent device.

1* is a short sleeve in which the end 0 spindle c is guided. Valve spindle h and rod f are normally spaced apart by the spring 8, in the position'shown in Fig. l, and the parts are so proportioned that when both valves are wide open the right hand end of rod f projects beyond the end of the hollow spindle e of valve a a distance equal to the travel necessary to close valve 1). While the valves are of the partially balanced type, it

is evident that there will always be a small I unbalanced pressure tending to open them due to the diameters of the right hand valve ports being greater than thoseof the left hand ports. Both valves being thus normally held wide open by the steam pressure,

both exhaust and live steam will flow to move the plunger d in valve casing ex tension'c, toward the left. Thisplunger at being in line with and adapted to abut against-rod f, forces said rod to the left whenever said plunger is moved by thermos static or other action toward the left. This motion of rod f is transmitted through its head 0, the spring 8, cylinder g, andvalve stem h, to valveb and begins to close the same, thus cutting down the live steam'suP- ply. If this does not check the rising temperature sufiiciently, the live steam valve 18 finally closed by continued movement of d and then further movement of rod merely compresses spring 8,, and telescopes the connecti'onto valve 6, but they parts are so prothermostaticmember d has moved far enough to strike the end'of the hollow stem. c'of the exhaust steam valve a and so has taken up all the slack in the lost motion con-.

nection between (i and c. Further action of the thermostat will then gradually close valve a. Motion of Z in the opposite direction reverses the above described series' of steps, first opening valve a to its fullest extent, and then gradually opening valve' b, to the required extent. A complete and automatic heat regulation is thus obtained, pn-

portioned that when valve 6 is closed, the

marily through control of the live steam, secondarily through controlling the exhaust,

steam, by one and the same thermostatic apparatus, thereby securing the highest degree of economy in live steam consumption, evenness of regulation and simplicity of construction.

I have not shown and described the thermostatic apparatus as its construction forms no part of my invention,and any suitable standard type of thermostat or expansion device may be used.

Having described my invention, I claim:

1. In an apparatus for automatlcally and consecutively controlling two valves from one thermostat or equivalent device, the combination with the two valves and a thermostatically operated member, of a spring connection'from said member to one valve, and a lost motion connect-ion from said member to the other valve.

2. In an apparatus forv automatically and consecutively controlling two valves from one thermostat or equivalent device, the

combination with the two valves and a thermostatically operated member, of a spring connection from said member to one valve, and a lost motion connection from said member to the other valve, the slack of the lost motion connection-being equal to the travel of the valve having the spring connection.

3. In an apparatus for automatically and consecutively controlling first the supply of live steam and afterward the supply of exhaust steam to a steam heating apparatus. the combination of a live steam valve and an exhaust steam valve having a common axis for their valve spindles, the spindle of the exhaust steam valve being hollow and that of the live steam valve passing through it, the live steam valve spindle having a spring controlled telescoping section, and, when both valves are fully open, projecting beyond the end of the other spindle a distance equal to the full travel of the live steam valve.

4. In an apparatus for automatically and consecutively controlling first the supply of live steam and afterward the supply of exhaust steam to a steam heating apparatus, the combination of a live steam valve and an exhaust steam valve having a common axis for their valve spindles, the spindle of the exhaust steanrvalve being hollow and that of the live steam valve passing through it, the live steam valve spindle having a spring controlled telescoping section, and, when both valves are fully open, projecting beyond the end of the other spindle a distance equal to the full travel of the live steam. valve, together with a thermostatically controlled member movable in line with the common axis of the two valve spindles, and adapted to engage their outer ends.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

, MAX SCHULZ.

Witnesses:

FREDERICK HOY'ERMANN, WILHELM STRUP. 

